A procedure for the wear prediction of collector strip and contact wire in pantograph-catenary system
A procedure for the wear prediction of collector strip and contact wire in pantograph-catenary system
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DOI：
10.1016/j.wear.2008.05.006
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发表时间：
2009-01-05
期刊：
影响因子：
5
通讯作者：
Collina, Andrea
中科院分区：
文献类型：
--
作者：
Bucca, Giuseppe;Collina, Andrea
摩擦以及诸如电弧和火花等电现象的影响决定了接触线和受电弓滑板之间滑动接触的磨损率，这两种影响以一种复杂的方式相互关联。研究受电弓滑板和接触线磨损的一种方法是进行实验室测试，以便对不同材料组合进行对比测试，并确定对诸如滑动速度、接触力和电流强度等主要参数的依赖性。在应用实验室测试结果时需要考虑的一个问题是将其外推到实际运行条件，以便评估不同解决方案之间的实际效益。在本文中，提出了一种将受电弓滑板和接触线之间接触的磨损模型与受电弓和接触网之间动态相互作用的模拟相结合的方法。所采用的磨损模型基于磨损图概念，包括电流的影响，并通过在实验室试验台上获得的结果进行调整。考虑了受电弓每个滑板与架空线接触线之间的电接触电阻对接触力的依赖性，并评估了受电弓两个滑板上各自的电流。然后将接触力和电流的瞬时值输入磨损模型，计算出沿架空线的受电弓滑板和接触线的磨损量，从而生成接触线的不规则轮廓。所提出的方法应用于两个案例：在第一个案例中，比较了直流线路中使用铜滑板和石墨滑板时接触线的磨损情况。在第二个案例中，预测了接触线机械张力变化对磨损程度的影响。(C) 2008 Elsevier B.V. 保留所有权利。
The effects of friction and electrical phenomena like arcing and sparking govern the wear rate in the sliding contact between the contact wire and the collector strip, these two effects are mutually interconnected in a complex manner. A means of investigating the wear of the collector strip and the contact wire is to carry out laboratory tests that allow to perform comparative tests between different material combinations and to establish the dependence on the main parameters such as sliding speed, contact force and current intensity. A problem to be considered in the application of the laboratory test results is their extrapolation to the real operating conditions, in order to assess the effective benefit among different solutions. In this paper, a procedure that combines a wear model for the contact between collector strip and contact wire with the simulation of the dynamic interaction between pantograph and catenary is proposed. The adopted wear model is based on the wear map concept, including the effect of electrical current flow, and it is tuned by means of the results obtained on laboratory test rig.The dependence of the electrical contact resistance on the contact force between each contact strip of the pantograph and the contact wire of the overhead line is considered and the corresponding electrical current on each of the two collectors of the pantograph is evaluated. Instantaneous values of contact forces and electrical current are then fed into the wear model and the amount of the wear of the collector strips and of the contact wire along the overhead line is calculated, generating an irregular profile of the contact wire.The proposed procedure is applied to two cases: in the first one the wear of the contact wire using copper collector strips and graphite collector strips for dc line are compared. In the second one, the consequence of the variation of the mechanical tension of the contact wire on the wear levels is predicted. (C) 2008 Elsevier B.V. All rights reserved.